Numerical Study of Quasi-Static Crack Growth Problems Based on Extended Finite Element Method

doi:10.1007/s12204-014-1557-8

上海交通大学学报（英文版） ›› 2014, Vol. 19 ›› Issue (6): 736-746.doi: 10.1007/s12204-014-1557-8

Numerical Study of Quasi-Static Crack Growth Problems Based on Extended Finite Element Method

ZHENG An-xing (郑安兴), LUO Xian-qi*(罗先启)

(School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiaotong University, Shanghai 200240, China)

出版日期:2014-12-31 发布日期:2014-12-08
通讯作者: LUO Xian-qi (罗先启) E-mail:luoxianqi@sjtu.edu.cn

Numerical Study of Quasi-Static Crack Growth Problems Based on Extended Finite Element Method

ZHENG An-xing (郑安兴), LUO Xian-qi*(罗先启)

(School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiaotong University, Shanghai 200240, China)

Online:2014-12-31 Published:2014-12-08
Contact: LUO Xian-qi (罗先启) E-mail:luoxianqi@sjtu.edu.cn

摘要/Abstract

摘要： The extended finite element method (XFEM) is a numerical method for modeling discontinuities within a classical finite element framework. Based on the algorithm of XFEM, the major factors such as integral domain factor and mesh density which all influence the calculation accuracy of stress intensity factor (SIF) are discussed, and the proper parameters to calculate the SIF are given. The results from the case analysis demonstrate that the crack path is the most sensitive to the crack growth increment size, and the crack path is not mesh-sensitive. A reanalysis method for the XFEM has been introduced. The example presented shows that there is a significantly reduced computational cost for each iteration of crack growth achieved by using the reanalysis method and the reanalysis approach has increasing benefits as the mesh density increases or the value of crack growth increments size decreases.

关键词: extended finite element method (XFEM), stress intensity factor (SIF), crack, level set, numerical methods

Abstract: The extended finite element method (XFEM) is a numerical method for modeling discontinuities within a classical finite element framework. Based on the algorithm of XFEM, the major factors such as integral domain factor and mesh density which all influence the calculation accuracy of stress intensity factor (SIF) are discussed, and the proper parameters to calculate the SIF are given. The results from the case analysis demonstrate that the crack path is the most sensitive to the crack growth increment size, and the crack path is not mesh-sensitive. A reanalysis method for the XFEM has been introduced. The example presented shows that there is a significantly reduced computational cost for each iteration of crack growth achieved by using the reanalysis method and the reanalysis approach has increasing benefits as the mesh density increases or the value of crack growth increments size decreases.

Key words: extended finite element method (XFEM), stress intensity factor (SIF), crack, level set, numerical methods

中图分类号:

TV 313

ZHENG An-xing (郑安兴), LUO Xian-qi*(罗先启). Numerical Study of Quasi-Static Crack Growth Problems Based on Extended Finite Element Method[J]. 上海交通大学学报（英文版）, 2014, 19(6): 736-746.

ZHENG An-xing (郑安兴), LUO Xian-qi*(罗先启). Numerical Study of Quasi-Static Crack Growth Problems Based on Extended Finite Element Method[J]. Journal of shanghai Jiaotong University (Science), 2014, 19(6): 736-746.

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Numerical Study of Quasi-Static Crack Growth Problems Based on Extended Finite Element Method

Numerical Study of Quasi-Static Crack Growth Problems Based on Extended Finite Element Method

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